Notes from author
Poke and parry your way to victory. Swap wold for red tearstone when you get low and riposte for an insane amount of damage.
The idea behind this build is that the Abyss Greatsword's damage is 100% physical and focuses on str/dex/humanity scaling, with the int/fai requirements being completely optional as far as damage is concerned. Due to the Abyss Greatsword's lack of combos (other than the WD into sR1, as with every greatsword), the nonexistant flexibility isn't more of an issue than it was before.
You'll bounce off of people but your damage output and poisebreak will remain the same. You'll deal 350-400 per hit on a moderately armored opponent and score roughly 875 on a bs, over 1.1k on a riposte.
With Red Tearstone activated you'll deal ridiculous damage.
Pyro is for safer attacks in case you need them.